The invention provides a cryogenic fluid variable-working-condition pumping pressure type conveying system which is formed by connecting a pressure reducer 1, an electromagnetic valve 2, a pore plate 3, a valve 4, a vaporizer 5, a valve 6, a regulating valve 7, a temperature sensor 8, a pressure sensor 9, a filter 10, a terminal 11, a flowmeter 12, a regulating valve 13, a valve 14, a valve 15, a variable frequency motor 16, a centrifugal pump 17, a valve 18, a container 19 and a pipeline. The cryogenic fluid variable-working-condition pumping pressure type conveying system is used for conveying cryogenic fluid in a pumping pressure manner, and accurate control of conveying flow of cryogenic fluid is realized through accurately controlling pressurizing gas flow and pump frequency and combining aperture of the regulating valves. Outer air source pressurization and vaporizer pressurization are adopted. The pressure reducer, the electromagnetic valve, the vaporizer, the centrifugal pump, the variable frequency motor and the regulating valves constitute an accurate pressure control assembly, and the accurate pressure control assembly regards conveying flow, pressurized air flow, pump inlet pressure and the like as measurement and control objects. The variable flow control technology contained in the cryogenic fluid variable-working-condition pumping pressure type conveying system can be used in the field of projects adopting cryogenic fluid conveying and needing variable flows.